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What We Will Cover
SQL Server Storage Internals
Important SQL Server 2005/2008 Enhancements
Data Recovery Scenarios and Troubleshooting Techniques
Agenda
SQL Server Storage Internals
SQL Server 2005 Enhancements
System Database Recovery
User Database Inaccessible
BACKUP/RESTORE Failures
Database Consistency Errors
SQL Server Storage Internals
Database and File States
Resource Database
Catalog Views and System Base Tables
Allocation Structures
Database Checksum
Fast Recovery
Deferred Transactions
Read-Only Compressed Databases
BACKUP/RESTORE Enhancements
BACKUPWITH CHECKSUM
Full-text integrated
RESTOREVERIFYONLY
WITH CONTINUE_AFTER_ERROR
Page Level Restore
Data Recovery Scenarios
System Database Recovery
User Database Inaccessible
BACKUP/RESTORE Failures
Database Consistency FailuresRuntime Errors
DBCC CHECKDB Errors
System Database Recovery
Recovering MasterFiles not available
Rebuild using Setup and Restore (you must reapply fixes)
Recovering ModelRebuild using Setup (you must reapply fixes)
Recovering MSDBSystem can still start but SQLAgent will not
instmsdb.sql not an option (at this time) to build clean
System Database Recovery (2)
Recovering Resource DatabaseCopy the correct version of the files
Rebuild using Setup (you must reapply fixes)
Failure to create tempdbServer can start as long as primary files can be created
Operating System ReinstallationSQL Setup can reuse existing system databases
Summary
SQL Server 2005 greatly enhances data recovery capabilities
CHECKSUM can help detect problems early
Previous problems may not occur as often (Ex. Deferred transactions, read-retry)
Nothing substitutes a good backup
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IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
